This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Denne tråden ble arkivert. Still et nytt spørsmål dersom du trenger hjelp.

Since about 10 days, Thunderbird responds "Recipient address : missing authentification. Please check...". Using Thundrbrd since mny years. I've never seen that

  • 1 svar
  • 1 har dette problemet
  • 22 views
  • Siste svar av Onno Ekker

AL-Ollntown
AL-Ollntown
more options

I'm using Thunderbird since many years (more than 10). Though I changed nothing in my Thunderbird configuration, nor in my computer configuration, when I send any e-mail, Thunderbird produces an error message : " An error occurred while sending mail. The mail server responded: 5.7.1 <lal.andrian@club-internet.fr>: Recipient address rejected: Missing Authentication. 

Please check the message recipient "lalatian@club-internet.fr" and try again."

This error message appears for all recipients I have tested. So, since about 2 weeks, I am able to receive e-mail in Thunderbird, but I can't send any e-mail. Thus, I must use other mail managers in order to send my e-mails. Best regards.

I'm using Thunderbird since many years (more than 10). Though I changed nothing in my Thunderbird configuration, nor in my computer configuration, when I send any e-mail, Thunderbird produces an error message : " An error occurred while sending mail. The mail server responded: 5.7.1 <lal.andrian@club-internet.fr>: Recipient address rejected: Missing Authentication. Please check the message recipient "lalatian@club-internet.fr" and try again." This error message appears for all recipients I have tested. So, since about 2 weeks, I am able to receive e-mail in Thunderbird, but I can't send any e-mail. Thus, I must use other mail managers in order to send my e-mails. Best regards.

All Replies (1)

Onno Ekker
Onno Ekker
more options

This looks like club-internet.fr (or sfr) suddenly wants you to authenticate before sending a mail. Go to Tools -> Account Settings -> SMTP Accounts (in the left pane, last item in the list) and configure it to use the same account as for receiving messages and probably use Normal password as authentication method.